JPH0865409A - Communication equipment - Google Patents

Abstract

PURPOSE: To reduce the power consumption of a communication equipment by keeping a detection state set to a call signal detection circuit even while power supply to a major section is stopped. CONSTITUTION: This equipment is provided with a call signal detection circuit 5a for detecting the reception of a call signal, a means for setting the call signal detection circuit 5a to a detecting state to detect a call signal of a specific specification, and a means 9b for stopping the power to an in-equipment major section including a CPU 9a in the standby state when the equipment does not execute the communication operation. Then even for a period when the power supply is stopped to the in-equipment major section, the detection state set to the call signal detection circuit 5a is maintained and when a call signal is received for a period when the power supply is stopped, power supply is restarted, and the call is automatically replied to execute data communication. Since the power supply to the in-equipment major section including the CPU 9a is stopped during the standby state of the equipment, the power consumption is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device which is connected to a telephone line of each country and automatically responds to incoming calls to perform data communication.

[0002]

2. Description of the Related Art PSTN (Public Switch)
The electrical specifications of the ed Telephone Network) differ slightly from country to country. For example, PS
A TN communication device receives a call signal from a telephone line when an incoming call arrives, but the voltage and frequency of the call signal differ depending on the country.

For this reason, a communication device that is exported to each country is provided with an operating means for setting the country in which the device is used. Then, when installing the communication device, the service person sets the country in the device.

The communication device changes the circuit characteristic of the ringing signal detection circuit for detecting the ringing signal during operation, and sets the ringing signal of the set country to be detected.

As a result, it becomes possible to correctly execute a predetermined communication operation in the country in which the communication device is installed.

By the way, the control information corresponding to the country set by the operating means is stored in the memory. During operation of the communication device, the CPU reads the control information from the memory and changes the circuit characteristics of the call signal detection circuit.

[0007] The communication device needs to constantly monitor the incoming call so that the incoming call can be automatically answered. For this reason,
Conventionally, the CPU is always operated to maintain a predetermined detection state of the ringing signal detection circuit.

[0008]

In this case, in order to operate the CPU, it is necessary to constantly supply electric power, which causes a problem that the power consumption of the device becomes large.

An object of the invention is to reduce the power consumption of the device.

[0010]

To this end, in claim 1 of the present application, a communication device detects a call signal detection circuit for detecting reception of a call signal, and the call signal detection circuit detects a call signal of a specific specification. Means for setting the detection state, a means for stopping the power supply to the main part of the device including the CPU during standby when the device is not performing a communication operation, and a means for stopping the power supply to the main part of the device. Even during the period, means for maintaining the detection state set in the ringing signal detection circuit, and during the period when the power supply to the main part of the apparatus is stopped, when the ringing signal is received, the power supply is restarted, A means for automatically responding and executing data communication with the other party is provided.

According to a second aspect of the present invention, the telephone for call, the means for setting the telephone mode in which the data communication is not executed, and the receiving of the ringing signal during the period when the power supply to the main part of the apparatus is stopped. However, in the case of the telephone mode, a means for maintaining the stopped state of the power supply as it is is provided.

According to a third aspect of the present invention, in addition to the structure of the first aspect, even if the telephone is used for calling and the telephone is operated while the power supply to the main part of the apparatus is stopped,
Means for maintaining the stopped state of power supply as it is.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, when the time during which power is supplied to the main part of the apparatus without performing the communication operation exceeds a certain time, the power is automatically supplied. A means for stopping is provided.

[0014]

According to the first aspect of the present invention, when the apparatus is on standby, the CPU
Since power supply to the main part of the apparatus including the power supply is stopped, power consumption can be reduced. Further, even during the period in which the power supply is stopped, the detection state of the ringing signal is maintained, so that a predetermined response operation can be executed when an incoming call is received.

According to the second aspect of the present invention, in the telephone mode, since the main body device does not need to operate, during the period in which the power supply to the main part of the device is stopped, the state is maintained even if the incoming call is received. By maintaining, the power consumption of the device can be further reduced.

According to the third aspect of the present invention, since the main unit does not need to operate even when the telephone is operated to make a call, it is possible to reduce the power consumption in the same manner as above by keeping the power supply stopped state. You can

According to the present invention, when the communication operation is not executed, the power supply to the main part of the apparatus is automatically stopped, so that the power consumption can be reduced without the user's intentional operation. .

[0018]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a facsimile apparatus according to an embodiment of the present invention. In the figure, a scanner 1 reads an original image, and a plotter 2 prints the image on a recording sheet. The encoding / decoding 3 compresses image information to be transmitted,
The original image information is restored from the received compressed data.

The modem 4 sends and receives a transmission control signal for facsimile communication and a data signal for image information. The network control unit 5 is connected to the telephone line and the telephone device 6 and executes line control at the time of making and receiving a call and circuit switching at the time of a call. A call signal detection circuit 5a for detecting a call signal received from a telephone line is provided in the network control unit 5. The telephone device 6 is a telephone or an answering machine which is arbitrarily connected by the user.

The operation display section 7 is for displaying various information such as the operating status of the apparatus as the user executes various operations.

The power supply section 8 receives a commercial power supply of 100 V AC and outputs a DC power supply for operating the apparatus. The power supply unit 8 includes a transformer rectifier circuit 8a and a regulator circuit 8
and b. The transformer rectifier circuit 8a is AC10.
The power source voltage Vh of 0V to + 24V is generated, and the regulator circuit 8b generates two types of power source voltages Vm and Vs of + 5V from the power source voltage Vh.

The system control section 9 monitors and controls each section in the apparatus, and comprises a CPU 9a and a control circuit 9b. The CPU 9a is a general microcomputer system. The control circuit 9b detects the device state and controls the power supply state.

FIG. 2 shows a part of the internal circuit of the network controller 5. In the figure, one line of the telephone line is connected to the common terminal c1 of the switching circuit 501, and the other line is connected to the common terminal c2 via the line sensor 502. The contacts a1 and a2 of the switching circuit 501 are connected to the call signal detection circuit 5a and the telephone device 6. The contacts b1 and b2 of the switching circuit 501 are connected to the two terminals of the diode bridge circuit 503, respectively.

The other terminal of the diode bridge circuit 503 is connected to the collector terminals of the internal transistors of the photocouplers PC1 and PC2. The emitter terminal of the internal transistor of the photocoupler PC2 is connected to one end of the direct current circuit 504 and one end of the capacitor C1. The other end of the capacitor C1 is connected to the transformer 5
05 is connected to one end of one winding. The other end of the winding is connected to the other end of the DC energizing circuit 504 and the other terminal of the diode bridge circuit 503.

The anode terminal of the internal diode of the photocoupler PC1 is connected to the line of the power supply voltage Vm via the resistor R1, and its cathode terminal is the transistor Tr1.
It is connected to the collector terminal of. Transistor Tr1
The emitter terminal of is grounded and its base terminal is C
The control signal Sa is input from the PU 9a.

Similarly, the anode terminal of the internal diode of the photocoupler PC2 is connected to the power supply voltage Vm via the resistor R2.
Connected to the line of the cathode terminal of the transistor T
It is connected to the collector terminal of r2. The emitter terminal is grounded, and the base terminal receives the control signal Sb from the CPU 9a.

The other winding of the transformer 505 is connected to the modem 4
It is connected to the. Detection signal HOO of line sensor 502
K and CNG are input to the CPU 9a. The line of the detection signal HOOK is connected to the control circuit 9b. The switching circuit 501 is controlled by a control signal Sc input from the CPU 9a.

FIG. 3 shows a circuit diagram of the ringing signal detection circuit 5a. In the figure, the line of the contact a1 of the switching circuit 501 is connected to one terminal of the diode bridge circuit 506 and one end of the capacitor C2. The other two terminals of the diode bridge circuit 506 are connected to the collector terminal and the emitter terminal of the internal transistor of the photocoupler PC3.

The other end of the capacitor C2 is connected to the other terminal of the diode bridge circuit 506, one terminal of the diode bridge circuit 507, and one end of the capacitor C3. Another two of the diode bridge circuit 507
The terminals are connected to the collector terminal and the emitter terminal of the internal transistor of the photocoupler PC4.

The other end of the capacitor C3 is connected to the other terminal of the diode bridge circuit 507 and the Zener diode D.
1 is connected to the anode terminal. The cathode terminal of the Zener diode D1 is connected to the cathode terminal of the Zener diode D2, and the anode terminal thereof is connected to one terminal of the diode bridge circuit 508. The other two terminals of the diode bridge circuit 508 are connected to the collector terminal and the emitter terminal of the internal transistor of the photocoupler PC5.

The other terminal of the diode bridge circuit 508 is connected to one end of the resistor R3 and one end of the resistor R4. The other end of the resistor R3 has a diode bridge circuit 5
09 is connected to one terminal. The other two terminals of the diode bridge circuit 509 are connected to the collector terminal and the emitter terminal of the internal transistor of the photocoupler PC6.

The other end of the resistor R4 is connected to one end of the resistor R5, the cathode terminal of the diode D3 and the anode terminal of the internal diode of the photocoupler PC7. The emitter terminal of the internal transistor of the photocoupler PC7 is grounded, and the collector terminal is connected to the control circuit 9b. This terminal is a terminal from which the detection signal RING is output, and the detection signal RING is also input to the CPU 9a.

The line of the contact a2 of the switching circuit 501 is connected to the cathode terminal of the internal diode of the photocoupler PC7, the other end of the resistor R5, and the anode terminal of the diode D3.

The ringing signal detection circuit 5a has four signal lines connected to the control circuit 9b. One of them
The two signal lines are connected to the photocoupler P via the resistor R6.
It is connected to the anode terminal of the internal diode of C3 and its cathode terminal is grounded. Similarly, the other one signal line is connected to the photocoupler PC4 via the resistor R7.
Is connected to the anode terminal of the internal diode of and its cathode terminal is grounded. Another signal line is connected to the anode terminal of the internal diode of the photocoupler PC5 via the resistor R8, and the cathode terminal thereof is grounded. The other signal line is connected to the anode terminal of the internal diode of the photocoupler PC6 via the resistor R9, and the cathode terminal thereof is grounded.

FIG. 4 shows the circuit configurations of the control circuit 9b and a part of each of the operation display section 7, and the regulator circuit 8b. In the figure, one contact of the switch 701 in the operation display unit 7 is pulled up to the power supply voltage Vs via the resistor R10, and the other contact is grounded. The common terminal of the switch 701 is connected to the input terminal of the inverter circuit 901. The signal output from this common terminal is also input to the CPU 9a.

The output terminal of the inverter circuit 901 is connected to the clock terminal CK of the flip-flop 902. The data terminal D is pulled up to the power supply voltage Vm via the resistor R11. Also, the set terminal S is
It is pulled up to the power supply voltage Vs via the resistor R12 and is connected to the collector terminal of the transistor Tr3 and one end of the capacitor C4.

The other end of the capacitor C4 is grounded. The emitter terminal of the transistor Tr3 is grounded,
The control signal Sd is input to the base terminal from the CPU 9a.

The reset terminal R of the flip-flop 902 is pulled up to the power supply voltage Vs via the resistor R13. The output terminal Q is connected to one input terminal of the NAND circuit 903.

Photocoupler PC of ringing signal detection circuit 5a
The line of the collector terminal of 7 is a power supply voltage V with a resistor R14.
It is pulled up to s and is connected to the input terminal of the inverter circuit 904. The output terminal is the NAND circuit 905.
Connected to one of the input terminals.

Further, the CPU 9a to the flip-flop 9
The control signal Se is input to the data terminal D of 06.
The control terminal CT is pulled up to the power supply voltage Vm via the resistor R15. The output terminal Q is
It is connected to the other input terminal of the NAND circuit 905.
The output terminal of the NAND circuit 905 is the NAND circuit 903.
Is connected to the other input terminal of.

The output terminal of the NAND circuit 903 is connected to the clock terminal CK of the flip-flop 907.
The data terminal D of the flip-flop 907 has a resistor R16.
Is pulled up to the power supply voltage Vs via. Also,
The set terminal S is pulled up to the power supply voltage Vs via the resistor R17, and one end of the capacitor C5 is connected to the set terminal S. The other end of the capacitor C5 is grounded.

Reset terminal R of flip-flop 907
A control signal Sf is input from the CPU 9a, and its terminal is pulled up to the power supply voltage Vs via a resistor R18.

The output terminal Q of the flip-flop 907 is
It is connected to the base terminal of the transistor Tr4 in the regulator circuit 8b via the resistor R19.

In the regulator circuit 8b, the power supply voltage V
h is applied to the collector of the transistor Tr4 and the DC / DC converter 801. Transistor Tr
A DC / DC converter 802 is connected to the emitter of No. 4. The DC / DC converter 801 outputs the power supply voltage Vs, and the DC / DC converter 80
2 outputs the power supply voltage Vm. Power supply voltage V
The current capacity of s is smaller than the power supply voltage Vm, and DC /
The DC converter 801 is composed of, for example, a general-purpose three-terminal regulator element. The DC / DC converter 802 is a large capacity regulator circuit.

FIG. 5 shows another part in the control circuit 9b. In the figure, the control signal Sg is inputted from the CPU 9a to the data terminal D of the flip-flop 908,
The output terminal Q is connected to one end of the resistor R6 of the call signal detection circuit 5a. Similarly, flip-flop 90
Control signals Sh and Si are input to the data terminals D of 9 and 910, respectively, and the output terminal Q is connected to one end of the resistors R7 and R9, respectively.

The control terminal CT of the flip-flop 908 is pulled up to the power supply voltage Vm via the resistor R20. Similarly, flip-flops 909, 9
The control terminal CT of 10 is pulled up to the power supply voltage Vm via resistors R21 and R22.

The line of the hook signal HOOK input from the line sensor 502 is connected to the input terminal of the inverter circuit 911. The output terminal is pulled up to the power supply voltage Vs via the resistor R23 and connected to one end of the resistor R8 of the ringing signal detection circuit 5a.

The base terminal of the transistor Tr5 is pulled up to the power supply voltage Vm via the resistor R24.
The cathode terminal of the light emitting diode D4 is connected to the collector terminal thereof, and the anode terminal thereof is connected to the line of the power supply voltage Vs via the resistor R25.

The flip-flops 902 and 907
Is a general D-type flip-flop, and the flip-flops 906 and 908 to 910 are D-type flip-flops with a latch function. Although not shown, the inverter circuits 901, 904, 911 and the AND circuit 903 are also provided.
The power supply voltage Vs is supplied as an operating power supply for the components themselves such as the flip-flops 902 and 906 to 910.

When the facsimile apparatus of this embodiment is used with the above configuration, the apparatus is connected to the telephone line. Also,
A telephone or an answering machine is connected as the telephone device 6.

FIG. 6 shows the operation of the facsimile apparatus when the power is turned on. That is, in this case, the user turns on the AC100V power supply by a predetermined operation to supply power to the device (process 1001).

As a result, the transformer / rectifier circuit 8a starts operating and outputs the power supply voltage Vh of + 24V (process 100).
2). This power supply voltage Vh is supplied to the regulator circuit 8b and the apparatus main body. In the regulator circuit 8b, D
The C / DC converter 801 inputs the power supply voltage Vh and outputs the power supply voltage Vs (process 1003). The power supply voltage Vs is supplied to part of the operation display unit 7 and the control circuit 9b.

At this time, both the clock terminal CK and the data terminal D of the flip-flop 902 in the control circuit 9b are at L (low) level, and the reset terminal R is at H (high).
It is at a level. Further, the transistor TR3 is off. When the power supply voltage Vs is turned on, the capacitor C4 is charged via the resistor R12. Since the set terminal S becomes L level only for the time required for this charging, the flip-flop 902 is turned on.

The output of the NAND circuit 905 is at H level, and the clock terminal CK of the flip-flop 907 is at L level. Data terminal D and reset terminal R
Are both at H (high) level. Then, similarly to the above, the capacitor C5 is charged through the resistor R17, and the set terminal S is at the L level during the charging period, so the flip-flop 907 is also turned on (process 100).
4).

When the flip-flop 907 turns on, the transistor TR4 also turns on. As a result, the power supply voltage V
h is supplied to the DC / DC converter 802, and DC / D
The power supply voltage Vm is output from the C converter 802 (process 1005). The power supply voltage Vm is supplied to the main part of the apparatus including the CPU 9a.

The facsimile apparatus of this embodiment has a normal mode and an energy saving mode as operation modes related to power consumption. The normal mode is an operation mode in which a main operation such as a communication operation can be executed, and the energy saving mode is an operation mode in which the main operation cannot be executed but the power consumption can be reduced. The power supply voltage Vm is a 5V power supply required for the main operation. The power supply voltage Vs is
It is a power supply required for device operation in energy saving mode.

Therefore, the power-on operation causes the facsimile apparatus to enter the normal mode. When the output of the power supply voltage Vm is started, the base current of the transistor Tr5 flows and the transistor Tr5 is turned on. As a result, the light emitting diode D4 is turned on. The light emitting diode D4 is provided, for example, on the operation display unit 7, and thereby a lamp display indicates that the device is in the normal mode (Process 1).
006).

By the way, the electrical specifications of the telephone line are slightly different depending on the country. In this embodiment, when the facsimile machine is used for the first time, a setting process for adapting the machine to the telephone line to be used is executed.

In this case, as shown in FIG. 7, the service person or the user inputs the country code of the country in which this device is used by a predetermined operation of the operation display unit 7 (process 200).
1).

Control data is stored in advance in a memory (not shown) in the CPU 9a for each country code of each country. CPU
9a reads the control data corresponding to the input country code and sends it to the flip-flops 908 to 910 as control signals Sg, Sh, Si.

At this time, the flip-flops 908 to 91
In the case of 0, since the control terminal CT is at the H level, the control signals Sg, Sh, S sent from the CPU 9a.
i is output as it is (process 2002).

The output control signals Sg, Sh, Si are
It is input to the call signal detection circuit 5a. In this case, the control signal Sg turns on or off the internal transistor of the photocoupler PC3. If the internal transistor is turned off,
The two terminals of the diode bridge circuit 506 connected to the capacitor C2 are opened, and the line current flows through the capacitor C2. On the other hand, when the internal transistor is turned on, the diode bridge circuit 506 has the above 2
The terminals are electrically connected, which is equivalent to a short-circuited circuit without the capacitor C2. That is, the control signal Sg selects whether or not the capacitor C2 is inserted in the ringing signal detection circuit 5a.

Similarly, the control signal Sh is sent to the photocoupler P.
The internal transistor of C4 is turned on / off to open or conduct between the two terminals of the diode bridge circuit 507. Therefore, the control signal Sh selects whether or not the capacitor C3 is inserted.

The internal transistor of the photocoupler PC5 is controlled to be in the ON state when the call signal detection circuit 5a is used. In this case, the diode bridge circuit 50
8 Zener diode D2 side terminal and resistors R3, R
The four terminals on one side are electrically connected.

The control signal Si turns on / off the internal transistor of the photocoupler PC6. When the internal transistor is turned off, the resistance R3 of the diode bridge circuit 509
Open between one terminal on the side and one terminal on the telephone line side.
On the other hand, when the internal transistor is turned on, the two terminals are electrically connected. Therefore, the control signal Si selects whether or not the resistor R3 is inserted between two lines of the line.

Therefore, for example, when the control signals Sg and Sh are at the L level and the control signal Si is at the H level, FIG.
As shown in (a), a ringing signal detection circuit 5a in which capacitors C2 and C3 and a resistor R3 are inserted is configured.
Further, for example, when the control signal Sg is at the L level and the control signal S
When h and Si are at H level, as shown in FIG.
The circuit has the capacitor C3 removed. Further, for example, when the control signals Sg, Sh, Si are all at the L level,
As shown in FIG. 7C, the circuit is one in which the resistor 3 is removed.

According to the telephone line standards of each country, for example, "○"
Of the calling signal, such as "detecting an AC signal of Hz ○ V as a calling signal" or "detecting an AC signal of ○ to ○ Hz above ○ V as a calling signal, and not detecting below a ○ V". The detection conditions are specified.

In the present embodiment, the circuit configuration of the ringing signal detection circuit 5a is equivalently changed as described above, and the ringing signal is set to a detection state in which the ringing signal can be detected by the standard of the country designated by the country code (process. 2003).

Next, the operation of receiving a call in the normal mode of this facsimile will be described.

In the present embodiment, in addition to the operation mode relating to power consumption, there are three types of response modes when receiving an incoming call, a telephone mode, a FAX mode and an answering machine mode.
The telephone mode is a mode in which, when the telephone device 6 is a telephone, the user answers with the telephone device 6 when receiving a call. FA
The X mode is a mode in which the facsimile machine automatically responds when an incoming call arrives. The answering machine mode is a mode in which, when the telephone device 6 is an answering machine, the answering machine responds when an incoming call is received.

The user performs a predetermined operation on the operation display unit 7 to
The desired response mode is preset.

If this facsimile machine receives an incoming call and receives a calling signal from the telephone line, the facsimile machine detects the calling signal, as shown in FIG.

That is, in the initial state of the normal mode, the switching circuit 501 is connected to the contacts a1 and a2,
The call signal is input to the call signal detection circuit 5a.

Normally, the hook signal HOOK output from the line sensor 502 is at L level, and the output of the inverter circuit 911 in the control circuit 9b is at H level. Therefore, the internal diode of the photocoupler PC5 in the call signal detection circuit 5a is energized and the internal transistor is turned on. As a result, one terminal of the diode bridge circuit 508 on the Zener diode side and one terminal of the resistors R3 and R4 side are electrically connected.

Now, for example, if the ringing signal detection circuit 5a is constructed as shown in FIG. 8A, the line current is equal to the capacitors C2 and C3 and the Zener diode D.
1 and D2 and split into a resistor R3 side and a resistor R4 side.
The line current flowing into the resistor R4 side is further divided into the resistor R5, the diode D3 and the photocoupler PC7.

As a result, the transistor in the photocoupler PC7 is turned on and the ringing detection signal RING is turned on.

When the ringing signal detection circuit 5a is constructed as shown in FIG. 8B, the line current does not flow in the capacitor C3 and the circuit operates in the same manner as above. Further, in the case of the configuration shown in FIG. 7C, the line current does not shunt to the resistor R3 and operates in the same manner as above.

The CPU 9a determines an incoming call by turning on the ringing detection signal RING of the ringing signal detection circuit 5a (above, processing 3001).

When the facsimile apparatus detects the call signal in this manner, it determines the set response mode (process 3002). Here, when the response mode is set to the FAX mode (“FA in process 3002”
X "), the telephone line is switched to the modem 4 side. That is, the control signal Sc is input from the CPU 9a to the switching circuit 501, and the switching circuit 501 is switched to the contacts b1 and b2 (process 3003).

Then, a DC loop is formed for the telephone line. That is, from the CPU 9a to the transistor Tr2
The control signal Sb is input to the transistor Tr2 and the transistor Tr2 is turned on. When the transistor Tr2 turns on, the internal diode of the photocoupler PC2 is energized and the internal transistor turns on. As a result, the switching circuit 501, the diode bridge circuit 503, the internal transistor of the photocoupler PC2, the direct current conducting circuit 504, and the line sensor 50.
A DC loop circuit of 2 is formed, and a line current flows (process 3004).

After that, facsimile communication is executed. In this case, the received signal received from the telephone line is transmitted from one end of the DC energizing circuit 504 to the capacitor C1 and the transformer 5 further.
It is input to the modem 4 via 05. Further, the transmission signal of the modem 4 is sent to the line through the opposite route. As a result, image reception or the like is executed (process 3005).

When the facsimile communication is completed, the DC loop circuit is disconnected. That is, the control signal Sb is turned off, the internal transistor of the photocoupler PC2 is also turned off, and the DC circuit is opened (process 3006). Then, the telephone line is switched and connected to the telephone device 6 side. That is, the switching circuit 501 is switched to the a1 and a2 sides again (process 3007).

On the other hand, when the response mode is set to the telephone mode (“TEL” in process 3002), the facsimile machine does not operate. In this case, the user can talk with the other party by performing a response operation on the telephone device 6.

If the answering mode is set to the answering machine mode (“answering TEL” in process 3002),
The reception of the CNG signal is monitored for a preset fixed time period (process 3008, process N from process N 2008 to process 30).
09, from N in process 3009 to process 3008).

At this time, the telephone device 6 automatically answers. CNG if the caller is calling by phone
No signal is received. In this case, after the lapse of the certain time (Y in process 3009), the facsimile apparatus ends the operation.

On the other hand, when the calling side is a facsimile machine, a CNG signal is transmitted. When the CNG signal is transmitted, the line sensor 502 detects the CNG signal.

When this facsimile machine detects a CNG signal (Y in process 3008), it operates similarly to the FAX mode (to process 3003).

Next, when the user makes a call using the facsimile apparatus, a predetermined call operation is executed on the operation display section 7.

In this case, the facsimile machine similarly performs the operations described in the above processing 3003 to 3007.
As a result, image transmission or the like is executed.

Next, when a telephone is connected as the telephone device 6, the telephone can be used to make a call. When making a call, the user off-hooks the telephone and dials.

As shown in FIG. 10, the facsimile device constantly monitors the hooked state of the telephone device 6 (process 4001). When the telephone device 6 is off-hook (“off-hook” in process 4001), the circuit of the ringing signal detection circuit 5a is opened so that no line current flows in the circuit.

That is, when the telephone device 6 is off-hook, a line current flows. The line sensor 502 detects the line current. At this time, the hook signal HOOK becomes H level. As a result, the output of the inverter circuit 911 in the control circuit 9b becomes L level, and the photocoupler PC5
The internal diode is turned off, and the internal transistor is turned off. Thereby, the diode bridge circuit 50
The one terminal of the Zener diode 8 and the one terminal of the resistors R4 and R5 are opened, and the circuit is opened to the telephone line (process 4002).

The reason why the circuit of the ringing signal detection circuit 5a is opened when the telephone device 6 is off-hook is to enable the telephone device 6 to send a correct dial pulse.

On the other hand, when the telephone device 6 is on-hook (“on-hook” in process 4001), the circuit of the call signal detection circuit 5a is closed. That is, in this case, since the hook signal HOOK becomes L level, the photo coupler PC
The internal transistor of 5 turns on, and the ringing signal detection circuit 5
The circuit is closed to a (process 4003).

The facsimile apparatus of this embodiment can switch from the normal mode to the energy saving mode by a manual operation and also has a function of automatically switching.

FIG. 11 shows the operation when switching to the energy saving mode by manual operation. That is, in this case
The user performs a predetermined mode switching operation on the operation display unit 7 (process 5001).

This mode switching operation is, for example, an operation of pressing one switch, and the switch 701 is switched while the switch is being pressed. That is, the switch 701 is a so-called tact switch. As a result, the switch 701 outputs an L level operation signal for a certain period of time.

When this operation signal is input, the CPU 9a sets the control signal Sf to L level. This resets the flip-flop 907 (process 500).
2).

When the flip-flop 907 is reset, the transistor Tr4 is turned off. This allows DC
/ DC converter 802 stops operating and power supply voltage V
The output of m is also stopped (process 5003).

When the output of the power supply voltage Vm is stopped, the CPU 9
The operation of the main part of the apparatus such as a is also stopped (process 500
4). At this time, the transistor Tr5 is turned off,
The light emitting diode D4 is turned off. As a result, a lamp indicating that the power saving mode has been entered is displayed (process 500).
5).

Even in the energy saving mode, the control circuit 9b
Operates with the power supply voltage Vs continuously supplied. In the control circuit 9b, the control terminals CT of the flip-flops 908 to 910 are stopped by stopping the output of the power supply voltage Vm.
Becomes L level. Flip-flops 908-910
Are the three control signals Sg, Sh, S that have been input at the timing when the control terminal CT changes to the L level.
latch i. As a result, the detection state of the ringing signal detection circuit 5a is maintained even after shifting to the energy saving mode.

Similarly, by stopping the output of the power supply voltage Vm, the control terminal CT of the flip-flop 906 is
Becomes L level. The flip-flop 906 latches the input control signal Sd at the timing when the control terminal CT changes to the L level. This control signal Sd is used in the FAX mode and the answering machine mode.
This signal is set to H level and set to L level in the telephone mode. As a result, in the FAX mode or the answering machine mode, the flip-flop 9
When 06 is set and the telephone mode is set, the flip-flop 906 is reset.

Next, the automatic switching operation from the normal mode to the energy saving mode will be described.

FIG. 12 shows this operation. The facsimile apparatus monitors the waiting time when the communication operation is not executed in the normal mode (process 6001). If the standby time exceeds a preset constant value (Y in process 6001), the same operation as in the manual operation is performed. That is, the CPU 9a uses the flip-flop 907.
Is reset (process 6002) and the output of the power supply voltage Vm is stopped (process 6003).

As a result, the operation of the main part of the apparatus is stopped (process 6004). Then, the fact that the energy saving mode has been entered is displayed by a lamp (process 6005).

Next, the incoming operation in the energy saving mode will be described.

FIG. 13 shows this incoming operation. That is, even in the energy saving mode, similarly to the normal mode, the ringing signal is detected (process 7001) and the set response mode is determined (process 7002).

In this case, the calling signal is detected by the calling signal detection circuit 5a as described above. Then, the determination of the response mode is executed in the control circuit 9b.

That is, if the FAX mode or the answering machine mode is set, for example, the flip-flop 906 is set, so that one input of the NAND circuit 905 becomes the H level. Since the incoming detection signal RING is inverted and input to the other input, the output of the NAND circuit 905 temporarily becomes L level when an incoming call is received. When the output of the NAND circuit 905 becomes L level, the output of the NAND circuit 903 becomes H level. Since the data terminal D of the flip-flop 907 is at the H level at this time, the flip-flop 907 is set.

In this way, when the response mode is set to the FAX mode or the answering machine mode (process 70).
02 "FAX / absence TEL"), flip-flop 9
07 is set (process 7003).

When the flip-flop 907 is set, the transistor Tr4 is turned on, and the DC / DC converter 802 starts outputting the power supply voltage Vm (process 7004). As a result, the operation of the main part of the apparatus such as the CPU 9a starts (process 7005).

Then, the same processing as in FIG. 9 is executed by the supervisory control operation of the CPU 9a. That is, first, the set response mode is determined (process 7006).
If the FAX mode is set (process 70)
06 "FAX"), the telephone line is switched and connected to the modem 4 side (process 7007) to form a DC loop (process 7).
008).

Then, facsimile communication is executed (process 7009). When the communication is completed, the DC loop is disconnected (process 7010), and the telephone line is switched and connected to the telephone device 6 side (process 7011).

On the other hand, when the answering machine mode has been set (“answering machine TEL” in process 7006), the reception of the CNG signal is monitored for a preset time limit (process 7).
012, processing 7013, processing 70 from N of processing 7012
From N of 13 to processing 7012).

When the CNG signal is received (process 7)
(Y of 012), and operates as described above (process 7007).
To), when a certain period of time has passed (Y of processing 7013), the operation is ended.

On the other hand, when the user wants to manually switch from the energy saving mode to the normal mode, the mode switching operation is executed. This mode switching operation is performed by processing 50 in FIG.
The operation is the same as 01. Thereby, as described above,
The operation signal output from the switch 701 is inverted by the inverter circuit 901 and input to the clock terminal CK of the flip-flop 902.

At this time, since the data terminal D of the flip-flop 902 is at the L level, the flip-flop 902 is reset. Flip-flop 902
Is reset, the output of the NAND circuit 903 becomes H level and the flip-flop 907 is set.
As a result, the output of the power supply voltage Vm is started and the mode is switched to the normal mode. In addition, it switches to the normal mode and C
When the PU 9a starts operating, the transistor Tr3 is set to 1
The pulse control signal Si is output. As a result, the transistor Tr3 is temporarily turned on and the flip-flop 902 is set. As a result, the entire circuit of the control circuit 9b returns to the initial state of the normal mode.

As described above, in this embodiment, when the facsimile apparatus is switched to the energy saving mode, the power source voltage Vm
Is stopped, and the power supply to the CPU 9a and other main parts of the apparatus is stopped.

Further, the call signal detection circuit 5a is set to detect the call signal of the specifications of each country by the control signals Sg, Sh, Si. In this case, the control signals Sg, Sh,
By latching Si in the flip-flops 908 to 910, the detection state of the call signal detection circuit 5a is maintained even in the energy saving mode in which the CPU 9a is stopped.

As a result, the power consumption of the facsimile apparatus can be reduced, and a predetermined response operation can be executed at the time of an incoming call to execute the facsimile communication.

Further, in this embodiment, the answer mode is set to the telephone mode, and during the period of the energy saving mode, the energy saving mode is maintained as it is even if an incoming call is received and a call signal is received. ing. This can further reduce the power consumption of the device since it is not necessary to return to the high power consumption normal mode when in the telephone mode.

Further, even if the telephone device 6 makes a call during the energy saving mode, the energy saving mode is maintained as it is. Therefore, similarly to the above, the power consumption of the device can be further reduced.

[0124] Further, when the predetermined time is exceeded without performing the communication operation in the normal mode, the power saving mode is automatically switched. Therefore, even if the user does not intentionally perform the mode switching operation, the power consumption is reduced. Can be reduced.

Although the above embodiments have been described by taking a facsimile machine as an example, the present invention can be similarly applied to various communication machines that are connected to a telephone line and automatically respond to data communication when a call is made. it can.

[0126]

As described above, according to the first aspect of the present invention, the power supply to the main part of the device including the CPU is stopped during the standby when the device is not performing the communication operation, but the power supply is stopped. Even during the period, the ringing signal detection circuit keeps the detection state of detecting ringing signal of a specific specification as it is, when the ringing signal is received, the power supply is restarted, and an automatic response is made to execute data communication with the other party. Therefore, it becomes possible to reduce power consumption and execute a predetermined response operation when an incoming call arrives.

According to a second aspect of the present invention, even if a call signal is received during the period in which the telephone mode in which the data communication is not executed is set and the power supply to the main part of the apparatus is stopped, the power supply is stopped. Since the state is maintained as it is, the power consumption of the device can be further reduced.

According to the third aspect of the present invention, even when the telephone is operated during the power supply stop period, the power supply stop state is maintained as it is. Therefore, similarly to the above, the power consumption of the apparatus is further reduced. can do.

According to the fourth aspect, if the time during which power is supplied to the main part of the apparatus exceeds a certain time without executing the communication operation, the power supply is automatically stopped. Power consumption can be reduced without conscious operation.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram showing a part of a network control unit.

FIG. 3 is a circuit diagram of a ringing signal detection circuit provided in the network control unit.

FIG. 4 is a circuit configuration diagram of a control circuit, a part of an operation display unit, and a regulator circuit.

FIG. 5 is a circuit configuration diagram of another portion of the control circuit.

FIG. 6 is a flowchart of a power supply startup operation.

FIG. 7 is a flowchart of a setting process for setting a country in which the device is used.

FIG. 8 is an explanatory diagram of various setting states of the ringing signal detection circuit.

FIG. 9 is a flowchart of an incoming call operation in a normal mode.

FIG. 10 is an operation flowchart of the facsimile device when making a call.

FIG. 11 is a flowchart of a setting process from a normal mode to an energy saving mode.

FIG. 12 is a flowchart of an automatic switching operation from a normal mode to an energy saving mode.

FIG. 13 is a flowchart of an incoming call operation in the energy saving mode.

[Explanation of symbols]

 1 Scanner 2 Plotter 3 Encoding / Decoding 4 Modem 5 Network Control Section 5a Ringing Signal Detection Circuit 6 Telephone Device 7 Operation Display Section 8 Power Supply Section 8a Transformer Rectifier Circuit 8b Regulator Circuit 9 System Control Section 9a CPU 9b Control Circuit 501 Switching Circuit 502 Line sensor 503, 506-509 Diode bridge circuit 504 DC energizing circuit 505 Transformer 701 Switch 801, 802 DC / DC converter 901, 904, 911 Inverter circuit 902, 906-909 Flip-flop 903, 905 NAND circuit PC1-PC7 Photo coupler C1 -C3 capacitor R1-R25 resistance Tr1-Tr3 transistor D1, D2 Zener diode D3 diode D4 light emitting diode

Claims (4)

[Claims] 1. A communication device, which is connected to various telephone lines having different call signal specifications, and which automatically responds to data communication when a call signal is received from the connected telephone line, detects reception of the call signal. A ringing signal detection circuit, a means for setting the ringing signal detection circuit to a detection state for detecting a ringing signal of a specific specification received by a connected telephone line, and a standby mode when the device is not performing communication operation. Means for stopping the power supply to the main part of the apparatus including the CPU, and means for maintaining the detection state set in the ringing signal detection circuit even while the power supply to the main part of the apparatus is stopped, When the call signal is received during the period in which the power supply to the main part of the apparatus is stopped, the power supply is restarted, and a means for automatically responding and performing data communication with the other party is provided. Communication device to collect. 2. A telephone for communication, a means for setting a telephone mode in which data communication is not executed as an operation mode of the device, and a ringing signal for a period during which power supply to main parts of the device is stopped. 2. The communication apparatus according to claim 1, further comprising means for maintaining the power supply stopped state in the telephone mode even if the communication mode is received. 3. A telephone for communication and means for maintaining the stopped state of the power supply as it is even if the telephone is operated to make a call while the power supply to the main part of the apparatus is stopped. The communication device according to claim 1, further comprising: 4. When the time during which power is supplied to the main part of the apparatus without executing communication operation exceeds a certain time,
2. The communication device according to claim 1, further comprising means for automatically stopping the power supply to the main part of the device.